Roselle flowers are rich in vitamin C, β-carotene, vitamin B1, B2, etc. They can not only promote metabolism, relieve physical fatigue, stimulate appetite, invigorate the spirit, cool and reduce internal heat, promote fluid production and quench thirst, and have diuretic effects, but are also a beautiful tea that naturally deals with impotence, heart disease, high blood pressure, regulates blood lipids, and reduces blood concentration.